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package org.apache.juneau.httppart;

import org.apache.juneau.*;
import org.apache.juneau.parser.*;

/**
 * Interface used to convert HTTP headers, query parameters, form-data parameters, and URI path variables to POJOs
 * 
 * <p>
 * The following default implementations are provided:
 * <ul class='doctree'>
 * 	<li class='jc'>{@link org.apache.juneau.httppart.UonPartParser} - Parts encoded in UON notation.
 * 	<li class='jc'>{@link org.apache.juneau.httppart.SimplePartParser} - Parts encoded in plain text.
 * </ul>
 * 
 * <p>
 * Implementations must include either a public no-args constructor or a public constructor that takes in a single
 * {@link PropertyStore} object.
 */
public interface HttpPartParser {

	/**
	 * Represent "no" part parser.
	 * 
	 * <p>
	 * Used to represent the absence of a part parser in annotations.
	 */
	public static interface Null extends HttpPartParser {}
	
	/**
	 * Converts the specified input to the specified class type.
	 * 
	 * @param partType The part type being parsed.
	 * @param in The input being parsed.
	 * @param type The category of value being parsed.
	 * @return The parsed value.
	 * @throws ParseException
	 */
	public <T> T parse(HttpPartType partType, String in, ClassMeta<T> type) throws ParseException;
}
